Alu Seatpost and Carbon Frame

07Lapierre · 13-04-2011 11:29am #1

Anyone know what grease should be used on an Aluminium seatpost in a Carbon frame? cheers

07Lapierre · 13-04-2011 1:30pm

No answers? ok I have some general purpose grease at home, that'll have to do.

TinyExplosions · 13-04-2011 1:51pm

I'd use carbon assembly paste myself, but it's cos I have it to hand

Lumen · 13-04-2011 1:51pm

My unqualified answer is "it depends".

Check whether your seat tube has a metal shim inside. If it does, the interface is metal-metal not metal-carbon, which would possibly change the grease choice.

For metal-carbon it doesn't really matter. From what I've read, CRP is chemically very stable, so your choices come down to how much grip vs slip you want.

I think I've used carbon assembly paste too.

07Lapierre · 13-04-2011 2:01pm

Cheers lads...I'm trying to stop a creaking noise which im sure is coming from the seatpost. There's no metal insert so its definitly alu to carbon.

blorg · 13-04-2011 2:03pm

Some manufacturers say under no circumstances use grease on carbon, other people will say it doesn't matter. Personally I would use carbon assembly paste. I have an alloy seatpost on my carbon MTB; I think the original post was ungreased though.

07Lapierre · 13-04-2011 2:13pm

blorg wrote: »

Some manufacturers say under no circumstances use grease on carbon, other people will say it doesn't matter. Personally I would use carbon assembly paste. I have an alloy seatpost on my carbon MTB; I think the original post was ungreased though.

I think mine was ungreased also. My own feeling is that ungreased is fine when frame and seatpost are new, but after 4 years, the alu has started to corrode ever so slightly. This is whats causing the creaking noise (the build up of very fine alu dust inside the frame).

Thanks for the recommendations.

TinyExplosions · 13-04-2011 2:20pm

07Lapierre wrote: »

I think mine was ungreased also. My own feeling is that ungreased is fine when frame and seatpost are new, but after 4 years, the alu has started to corrode ever so slightly. This is whats causing the creaking noise (the build up of very fine alu dust inside the frame).

Thanks for the recommendations.

Cancel your card, and tell CRC that it was because they made you nervous of it, and see if you get a voucher anyway

Hail 2 Da Thief · 13-04-2011 2:26pm

Tiny, CRC thread is that way >>>> :pac:

07Lapierre · 13-04-2011 2:30pm

TinyExplosions wrote: »

Cancel your card, and tell CRC that it was because they made you nervous of it, and see if you get a voucher anyway

I will thanks!

TinyExplosions · 13-04-2011 2:34pm

I posted that on the right thread, and then it appeared here... what's going on!

Alu Seatpost and Carbon Frame

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